Multiple choice

Assertion: Complex [Co(NH3)3F]+2 gives absorption bands in the far ultra-violet region but in complex [Co(NH3)3Br]+2, absorption occurs at a longer wavelength. Reason: These peaks are of low intensity and their extinction coefficients are usually between 1 and 50.

There are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as under:

 1. A and R are both correct and R is the correct explanation of A.
2. A and R are both correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R are both incorrect.

  1. A and R are both correct and R is the correct explanation of A.

  2. A and R are both correct and R is not the correct explanation of A.

  3. A is correct and R is incorrect.

  4. A is incorrect and R is correct.

  5. A and R are both incorrect.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Complex [Co(NH3)3F]+2 absorbs in the far ultra-violet region but in complex [Co(NH3)3Br]+2, absorption occurs at a longer wavelength. It is so because the position of the charge transfer band depends on the nature of the metal and the ligand.